M. Ralph, C. Hurst, S. Guyatt, K. Goldsmith, and E.-L. Laakso, “In post-natal women with nipple pain, does photobiomodulation therapy (PBMT) at 660 nm compared with sham PBMT reduce pain on breastfeeding? A case series during COVID-19”, Laser Ther J, vol. 30, no. 1, Apr. 2023.